I'd stopped work on this for a bit while I played with some new ideas, but now I've gone back to my main story about Luna's redemption and recovery from the Nightmare. Doesn't mean I won't also do more of the new stuff. However, Chapters 5 and maybe 6 should come faster now, as I finalized and introduced Fischfootur, who is definitely in Chapter 5 as well, and will almost certainly get mentioned in later Shadowverse works.
Yay!